RealGM

You can find the updated advanced stats at:

Involvement Rate: https://fivetimesfive-blog.com/new-nba-advanced-offensive-statistics/inv-rate2019/
Direct Offensive Contribution (DOC): https://fivetimesfive-blog.com/new-nba-advanced-offensive-statistics/doc2019/
Direct Offensive Efficiency (DOE): https://fivetimesfive-blog.com/new-nba-advanced-offensive-statistics/doe2019/

You can also read about changes over time, analyzed for the best NBA players, in this blog post:
https://fivetimesfive-blog.com/2019/06/23/all-nba-team-players-and-changes-of-their-offensive-games-over-time/

Discuss, comment or simply enjoy checking the stats!

Just for kicks, went looking for players whose DOC is higher than their involvement rate. There is one: Rudy Gobert. FWIW.

Is all the data pulled from nba.com or are other sources used? Everything an exact count or are some of the less commonly reported stats estimated?